627E WHEEL TRACTOR-SCRAPER POWER TRAIN ELECTRICAL SYSTEM TRACTOR

SENR3326
January 1986
Schematic
627E Wheel Tractor-Scraper Power
Train Electrical System
(with Electronic Power Shift
Transmission Control System For ICM)
Tractor:
6EB1-UP
Scraper:
6FB1-UP
P/P Scraper:
6GB1-UP
P/P Scraper:
6HB1-UP
©2001 Caterpillar
All Rights Reserved
Printed in U.S.A.
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
Power Circuits
101 RD Battery 449 BU Speedometer Sender (Signal)
102 BU Head Lamp 450 YL Tachomter Sender (+)
103 YL Dome/Dash Lamp/Park,Tail Lamp 451 BR Tachomter Sender (-)
105 BR Key Switch 452 PU Torque Converter
106 WH Main Power Relay/Input
453
PK Secondary Steering Fault Lamp
107 WH Engine Shut Down 454 GN Retarders Indicator Lamp
108 BU Misc Wiper, Dome Lamp, Cigar Lighter 455
YL
Converter Temp Switch To Time Delay
109 OR Alternator
110 GN Windshield Wiper Switch (Right) 500 BR WINDSHIELD WIPER - FRONT (PARK)
111 YL Windshield Wiper Switch (Left) 501 GN WINDSHIELD WIPER - FRONT (LOW)
112 PU Main Power Relay/Output 502 OR WINDSHIELD WIPER - FRONT (HIGH)
113 OR Operator Monitor Panel 503 BR WINDSHIELD WIPER - REAR (PARK)
114 GN Warning Horn (Forward) 504 YL WINDSHIELD WIPER - REAR (LOW)
115 PK Flood Lamp (Front) 505 BU WINDSHIELD WIPER - REAR (HIGH)
116 BR Flood Lamp (Front) 506 PU WINDSHIELD WIPER FRONT
117 YL Flood Lamp (Side) 507 WH WINDSHIELD WIPER REAR
118 GN Windshield Wiper Switch (Front) 510 YL WINDSHIELD WASHER-PRIMER
119 PK Windshield Wiper Switch (Rear) 513 OR AIR CONDITIONER COMPRESSOR
120 YL Converter (24 V to 12 V) 514 PU AIR CONDITIONER CONDENSOR MOTOR
121 YL Backup Alarm/Lamp/Travel Alarm Timer 515 GY BLOWER MOTOR (HIGH)
122 BU Air Dryer 516 GN BLOWER MOTOR (MEDIUM)
123 WH Gauges (Servicemeter, Torque conv Solenoid) 517 BU BLOWER MOTOR (LOW)
124 GN Air Conditioner 519 PK THERMOSTAT TO DRYER PRESSURE SWITCH
125 OR Fuel Transfer Pump 520 WH OPERATOR AIR CONDITIONER SWITCH TO THERMOSTAT
126 PK Transmission Control 521 YL AIR COND SW TO RFGT SW
127 OR Cab Flood Lamp 522 WH AIR COND COMPR TO THERMO SW
128 OK Kickout Solenoid Switch 523 BR WINDSHIELD WIPER-LEFT (PARK)
129 BU Cigar Lighter 524 BU WINDSHIELD WIPER-LEFT (LOW)
130 GN Stop Lamp 525 GY WINDSHIELD WIPER-LEFT (HIGH)
131 BR Fire Control-Operator Warning 526 YL WINDSHIELD WIPER-RIGHT (PARK)
132 PK Antispin Control 527 GN WINDSHIELD WIPER-RIGHT (LOW)
133 OR Programmed Electronic Eng Cont Solenoid 528 PK WINDSHIELD WIPER-RIGHT (HIGH)
134 PK programmed Electronic Eng Cont Logic 529 WH WINDSHIELD WASHER-LEFT
136 GN Supplemental Steering 530 OR WINDSHIELD WASHER-RIGHT
137 RD Steering Motor Indicator 531 WH FIRE WARNING HORN
138 GN Automatic Lube Pump (Truck) 532 WH FIRE WARNING LAMP
141 PK Auxiliary Heater
533 RD HEAT SENSOR/TEST SWITCH
Ground Circuits
534 WH HEAT SENSOR/TEST SWITCH
200 BK Main Chassis
535 BU TRAVEL ALARM TIMER PRESS SWITCH
201 BK Operator Monitor Panel
536 OR TRAVEL ALARM TIMER MANUAL OVERRIDE
202 BK Transmission Control
537 GR TURN SIGNAL SWITCH TO FLASHER
203 BK Chassis Diagnostic
538 BR HAZARD INDICATOR
204 BK Operator Monitor Panel (Scraper)
539 BU TURN SIGNAL INDICATOR BASIC/RIGHT
205 BK Instrument
540 WH TURN SIGNAL INDICATOR LEFT
206 BK Battery Side of Disconnect Lighting Circuits
207 BK Starter Diagnostic 600 BR DASH BASIC
212 BK Antispin Coding Pin 16 601 GY DASH HIGH
213 BK Antispin Coding Pin 17 602 WH DOME
214 BK Antispin Coding Pin 18 603 PK ROTARY BEACON
215 BK Antispin Coding Pin 19 604 OR STOP
216 BK Antispin Coding Pin 20 605 YL TURN LEFT
217 BK Transmission Coding Pin 17 606 GY TURN RIGHT
218 BK Transmission Coding Pin 18 607 PK FLOOD FRONT
219 BK Transmission Coding Pin 20 608 GN FLOOD REAR
226 BK Operator Mon Panel Set Point Select 609 YL FLOOD SIDE
227 BK Transmission Coding Pin 37 610 OR HEAD LAMP BASIC
231 BK Transmission SW 611 PU HEAD LAMP HIGH
236 BK Transmission Coding Pin 36 612 GY BACKUP
241 BK Operator Mon Panel Time Delay Pin 3 613 PK LICENSE PLATE
242 BK Operator Mon Panel Time Delay Pin 4 614 PU PARK/TAIL/DASH
243 BK Operator Mon Panel Time Delay Pin 5 615 YL CAB FLOOD/ROPS
244 BK Operator Mon Panel Time Delay Pin 6 616 BU BUCKET FLOOD
Basic Machine Circuits 617 BR TAIL/POSITION LAMP-LEFT (ROADING PACKAGE)
301 BU Starter No. 1 Solenoid to Resistor 618 YL TAIL/POSITION LAMP-RIGHT (ROADING PACKAGE)
302 OR Starter No. 1 Solenoid to Diagnostic/Resistor to Diagnostic 619 GR HEAD LAMP LOW
304 WH Starter Relay No.1Output 622 PU FLOODLAMP 3 WAY SWITCH JUMPER
306 GN Starter Relay Coil/Neutral Start Switch 623 BU FLOODLAMP 3 WAY SWITCH JUMPER
308 YL Main Power Relay Coil 624 YL FLOODLAMP BOWL
310 PU Ether Switch to Ether Solenoid 625 BK COURTESY LAMP
Monitoring Circuits con't
Accessory Circuits
311 WH Ether Solenoid to Temperature Switch Control Circuits
312 PK Starter No.2 Solenoid to Resistor 702 OR TRANSMISSION BRAKE SWITCH JUMPER
313 GY Starter No.2 Diagnostic/Resistor to Diagnostic 703 BU TRANSMISSION UP SOLENOID
314 PU Starter Relay No.2 Output 704 GY TRANSMISSION DOWN SOLENOID
321 BR Backup Alarm/Lamp 705 PK TRANSMISSION LOCKUP CLUTCH SOL BASIC
322 GY Warning Horn (Forward) 706 BR TRANSMISSION RETARDER SWITCH
323 WH Fuel Transfer Pump Power 707 PU TRANSMISSION BED RAISE SWITCH
324 BU Differential Lockup Solenoid 708 YL TRANSMISSION HOLD SWITCH
325 PK Fuel Pump Relay Oil Press. Switch 709 OR TRANSMISSION PICKUP POWER
326 PU Key Switch "C" Terminal 710 GN TRANSMISSION SPEED PICKUP SIGNAL
327 PK Shutdown Solenoid 711 BR TRANSMISSION LEVER CODE 1
328 RD Shutdown Module "OFF" 712 WH TRANSMISSION LEVER CODE 2
713 OR TRANSMISSION LEVER CODE 3
400 GN Servicemeter Switch 714 YL TRANSMISSION LEVER CODE 4
403 GN Alternator ( R ) Terminal 715 GN TRANSMISSION LEVER CODE 5
404 YL Operator Mon Panel Hydraulic Oil Temp 716 BU TRANSMISSION LEVER CODE 6
405 GY Operator Mon Panel Oil Pressure 720 PU TRANSMISSION BRAKE SWITCH
406 PU Operator Mon Panel Coolant Temperature 721 BR TRANSMISSION GEAR CODE 1
407 PK Operator Mon Panel Conv/Retarder Oil Temp 722 WH TRANSMISSION GEAR CODE 2
408 WH Operator Mon Panel Brake Press. (Air) 723 OR TRANSMISSION GEAR CODE 3
409 OR Operator Mon Panel Neutral 724 YL TRANSMISSION GEAR CODE 4
410 WH Operator Mon Panel Fault Alarm 725 GN TRANSMISSION GEAR CODE 5
411 PK Operator Mon Panel Master Fault Lamp 726 BU TRANSMISSION GEAR CODE 6
412 BU Operator Mon Panel Coolant Flow 727 GN STEERING MOTOR RELAY
413 BR Operator Mon Panel Fuel Pressure 728 BU SUPPLEMENTAL STEERING CONTROL SWITCH
414 PK Operator Mon Panel Low Fuel 733 BR SWITCHING GEAR CODE 1 FRONT
415 GN Operator Mon Panel Test Switch 734 WH SWITCHING GEAR CODE 2 FRONT
416 OR Secondary Steering Switch 735 OR SWITCHING GEAR CODE 3 FRONT
417 GY Primary Steering Switch 736 YL SWITCHING GEAR CODE 4 FRONT
418 YL Operator Mon Panel Oil Pressure (High Setting) 737 GN SWITCHING GEAR CODE 5 FRONT
419 YL Operator Mon Panel Parking Brake 738 BR SWITCHING GEAR CODE 1 REAR
420 OR Operator Mon Panel Fuel Filter/Low Accum Press 739 WH SWITCHING GEAR CODE 2 REAR
421 BU Operator Mon PanelFault Lamp (Scraper) 740 OR SWITCHING GEAR CODE 3 REAR
422 YL Operator Mon Warning Horn (Scraper) 741 YL SWITCHING GEAR CODE 4 REAR
423 GY Operator Mon Panel Test Switch (Scraper) 742 GN SWITCHING GEAR CODE 5 REAR
424 GY Operator Mon Panel Power Train Temperature 743 PU SWITCHING NEUTRAL/RUN SWITCH
425 PK Operator Mon Panel Power Train Oil Level 744 BU SWITCHING UP SOLENOID
426 BR Operator Mon Panel Power Train Oil Filter 745 GY SWITCHING DOWN SOLENOID
427 GN Operator Mon Panel Power Train Oil Filter Jumper 746 PK SWITCHING SYNCHRONIZE SOLENOID
428 OR Operator Mon Panel Transmission Oil Temp 747 WH SWITCHING NO SYNCHRONIZE SOLENOID
429 YL Operator Mon Panel Brake Oil Temperature 756 WH TRANSMISSION LOCKUP CLUTCH SOLENOID
431 GN Operator Mon Panel Low Transfer Pump Press 761 GY LIFT KICKOUT SOLENOID SWITCH
432 PK Operator Mon Panel Brake Pressure (Oil) 762 YL BUCKET POSITIONER SOLENOID SWITCH
433 BU Operator Mon Panel Brake Pressure (Oil) Jumper 763 BU TORQUE CONVERTER SOLENOID
434 BU Operator Mon Panel Power Train Temp Jumper
435 YL Operator Mon Panel Power Train Temp Jumper
436 OR Operator Mon Panel Power Train Oil Filter Jumper 765 OR APRON SOLENOID (SCRAPER)
437 BR Operator Mon Panel Fuel Level To Fuel Filter Jumper
767 WH ANTISPIN PICKUP POWER
438 YL Operator Mon Panel Coolant Temp JumperAir Press. Gauge
768 OR ANTISPIN PICKUP TRANSMISSION
440 BR
Air Press Gauge 769 BU ANTISPIN PICKUP LEFT
441 OR Engine Coolant Temp Gauge
770 GN ANTISPIN PICKUP RIGHT
442 GY Hydraulic System Temp Gauge
771 PU ANTISPIN SERVICE BRAKE SWITCH
443 YL Power Train Temp Gauge
772 BR ANTISPIN RETARDER SWITCH
444 BU Conv/Retarder Oil Temp Gauge (Tractor)
773 GY ANTISPIN SERVOVLAVE
445 GN Conv/Retarder Oil Temp Gauge (Scraper)
774 YL ANTISPIN SOLENOID - LEFT
446 PU Brake Oil Temperature Gauge
775 BR ANTISPIN SOLENOID - RIGHT
Monitoring Circuits
764 PU
SUPPLEMENTAL STEERING CONTROL SWITCH
(MOTOR GRADER)
Wire Description
Wire
Number
Wire
Color
Description
Wire
Number
Wire
Color
Description
D W
20
37
202-BK
704-GY
10
10
470-PU 470-PU-18
D
V V
D
E627EPT
W
D
D
H
H
J
J
L
202-BK
7
23
2
8W0744
5T1523
5T1568
8W3570
7T3418
6T4958
8W3380
6G9811
TRANSMISSION SWITCH
(SCRAPER)
9G1813
U
745-GY
746-PK
37
20
L
+ BATTERY
126-PK
GROUND
GROUND VERIFY
GROUND VERIFY
GROUND
FRONT GR 1
FRONT GR 2
FRONT GR 5
HOLD SWITCH
FRONT GR 3
FRONT GR 4
LEVER 1
LEVER 2
LEVER 5
LEVER 3
LEVER 4
GROUND VERIFY
NEUTRAL
LEVER 1
LEVER 2
LEVER 5
LEVER 3
LEVER 4
GEAR 1
GEAR 2
GEAR 5
XMSN SPEED
+10 V
DOWN SOL
UP SOL
GEAR 3
GEAR 4
GROUND
GEAR 1
GEAR 2
GEAR 5
GEAR 3
GEAR 4
GROUND VERIFY
GROUND
GEAR 1
GEAR 2
GEAR 5
GEAR 3
GEAR 4
ID CODE 3
ID CODE 2
ID CODE 1
ID CODE 0
1
2
31
32
33
34
35
8
28
29
30
16
11
12
13
14
15
5
1
2
3
4
5
9
1
3
4
5
8
9
2
6
7
8
7
6
3
2
1
10
4
5
9
7
14
17
18
19
36
37
22
23
24
25
26
21
7
20
27
9
10
3
4
5
37
6
TRANSMISSION
CONTROL
(TRACTOR)
9W009
202-BK
715-GN
714-YL
713-OR
712-WH
711-BR
716-BU
202-BK-18
715-GN-18
714-YL-18
713-OR-18
712-WH-18
711-BR-18
716-BU-18
202-BK
726-BU
725-GN
724-YL
723-OR
722-WH
721-BR
202-BK-18
726-BU-18
725-GN-18
724-YL-18
723-OR-18
722-WH-18
721-BR-18
A
B
C
D
E
F
G
NEUTRAL/START CONTROL PIN 4
9
D W
D W
TRANSMISSION
10 A
16
37
FUSE 3K8782
+24 V SOURCE
112-PU-10
MAIN RELAY
3T0376
NEU/RUN
SWITCH
7N8000
NO SYNC
LAMP
7N5876
3 2
202-BK
126-PK
202-BK
733-BR
734-WH
735-OR
736-YL
737-GN
708-YL
202-BK
HOLD SWITCH
962795
D WW WW
SHIFT LEVER SWITCH
9G8204
10
10
TRANSMISSION SWITCH
(TRACTOR)
7T3419
D
A
B
C
+V
SIGNAL
GROUND
TRANSMISSION
SPEED SENDER
7T6337
202-BK
B A
D
B A
D
B A
L
B A
L
B A
L
DOWNSHIFT
SOLENOID
9P0222
DOWNSHIFT
SOLENOID
9P0222
UPSHIFT
SOLENOID
9P0222
UPSHIFT
SOLENOID
9P0222
709-OR
710-GN
703-BU
E627HID
INDENT.
HARNESS AS.
D
H
J
L
V
U
W
WW
SYNC
SOLENOID
9P0222
UNLESS OTHERWISE SPECIFIED
ALL WIRE IS 16 GAGE.
20 20
17
13
1
2
3
4
5
6
7
17
13
1
2
3
4
5
6
7
17
13
1
2
3
4
5
6
7
17
13
1
2
3
4
5
6
7
8
9
10
11
12
19
18
20
14
15
16
738-BR
739-WH
740-OR
741-YL
742-GN
202-BK
747-WH
743-PU
126-PK
202-BK
733-BR
734-WH
735-OR
736-YL
737-GN
7
3
7
1
2
4
5
6
738-BR-18
739-WH-18
740-OR-18
741-YL-18
742-GN-18
202-BK-18
A
B
C
E
F
G
10
U
L
744-BU
+BATTERY
GROUND
FRONT GR1
FRONT GR2
FRONT GR3
FRONT GR4
REAR GR 1
REAR GR 2
REAR GR 3
REAR GR 5
REAR GR 4
UP SOL
DOWN SOL
SYNC SOL
FRONT GR5
TRANSMISSION
SWITCHING CONTROL
(SCRAPER)
9G2537
20
SYNC LAMP
NEU/RUN SWITCH
SHIFT LEVER SWITCH
TRANSMISSION SWITCH (SCRAPER)
9G1813
R
N
1
2
3
4
5
6
7
8
10
9
8
6
5
4
3
2
1
1
2
4
5
6
7
4
3
2
1
N
R
B92445X1
HARNESS AND/OR
COMPONENTS
D-8W0744
Transmission Control
D-8W0744
W-8W3380
D-8W0744
H-5T1523
H-5T1523
J-5T1568
J-5T1568
L-8W3570
L-8W3570
Transmission Switching Control
D-8W0744
WW-6G9811
WW-6G9811
Shift Lever Switch
D-8W0744
V-7T3418
V-7T3418
Transmission Switch (Tractor)
L-8W3570
U-6T4958
U-6T4958
Transmission Switch (Scraper)
D-8W0744
Transmission Speed Sender
D-8W0744
Upshift, Downshift Solenoids
L-8W3570
Upshift, Downshift, Sync Solenoids
CONNECTORS IDENT.
37 CONTACTS
20 CONTACTS
14 CONTACTS
10 CONTACTS
7 CONTACTS
3 CONTACTS
2 CONTACTS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
IDENT.
COMPONENTS
1 Hold Switch.
2 Neutral/Run Switch.
3 No Sync Light.
4 Scraper Transmission Switch.
5 Scraper Transmission Switching Control.
6 Scraper Upshift, Downshift and Sync Solenoids.
7 Shift Lever Switch.
8 Tractor Transmission Control.
9 Tractor Transmission Switch.
10 Tractor Upshift and Downshift Solenoids.
11 Transmission Speed Sender.
TRANSMISSION SWITCH (TRACTOR)
7T3419
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3
4
5
6
8
9
10
11
1
2
7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
3
4
5
6
8
9
10
11
1
2
7